WO2014090199A1 - Systèmes et procédés pour éviter une interférence, estimer une voie et exécuter une autre signalisation dans une transmission multiutilisateur en duplex total - Google Patents

Systèmes et procédés pour éviter une interférence, estimer une voie et exécuter une autre signalisation dans une transmission multiutilisateur en duplex total Download PDF

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Publication number
WO2014090199A1
WO2014090199A1 PCT/CN2013/089529 CN2013089529W WO2014090199A1 WO 2014090199 A1 WO2014090199 A1 WO 2014090199A1 CN 2013089529 W CN2013089529 W CN 2013089529W WO 2014090199 A1 WO2014090199 A1 WO 2014090199A1
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WIPO (PCT)
Prior art keywords
bts
wireless devices
wireless device
wireless
transmission
Prior art date
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PCT/CN2013/089529
Other languages
English (en)
Inventor
Peiying Zhu
Wen Tong
Jianglei Ma
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Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to JP2015546836A priority Critical patent/JP2016503977A/ja
Priority to CN201380063780.8A priority patent/CN104838712B/zh
Priority to KR1020157018341A priority patent/KR101660202B1/ko
Priority to EP13862141.2A priority patent/EP2923522B1/fr
Publication of WO2014090199A1 publication Critical patent/WO2014090199A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication

Definitions

  • the present invention relates to systems and methods for wireless communications, and, in particular embodiments, to systems and methods for interference avoidance for multi-user full duplex transmission and to channel sounding using full duplex transmission.
  • New technologies such as coordinated multi-point (CoMP), interference alignment (IA), dirty paper coding (DPC), massive multiple-input multiple-output (MIMO), etc. may be some of the keys to capacity enhancement for wireless systems.
  • CoMP coordinated multi-point
  • IA interference alignment
  • DPC dirty paper coding
  • MIMO massive multiple-input multiple-output
  • FDD frequency division duplex
  • various channel feedback schemes have been proposed.
  • the overhead, accuracy, and feedback delay are still major roadblocks.
  • interest in full duplex transmission technology has surged in the quest to increase spectrum efficiency.
  • Several practical systems have demonstrated that a full duplex transmission system may cancel self-interference from the transmitter to its own receiver for low power transmission.
  • a method for scheduling transmissions in a multi-user wireless system includes determining, by a transmission point, neighboring wireless devices for each of a plurality of wireless devices located within a coverage area of the transmission point and determining, by the transmission point, a transmission schedules for respective ones of the plurality of wireless devices according to the neighboring information of the devices such that each respective wireless device is scheduled to transmit data over different time-frequency resources than those in which neighboring wireless devices of the respective wireless device are scheduled to receive data.
  • a network component configured for scheduling transmissions for a plurality of wireless devices in a multi-user full duplex transmission wireless system.
  • the network component includes a processor and a computer readable storage medium storing programming for execution by the processor.
  • the programming includes instructions to determine neighboring wireless devices for each of a plurality of wireless devices located within a coverage area of a base transceiver station (BTS).
  • BTS base transceiver station
  • the programming also includes instructions to determine transmission schedules for respective ones of the plurality of wireless devices such that each respective wireless device is scheduled to transmit data over different time-frequency resources than those in which neighboring wireless devices of the respective wireless device are scheduled to receive data.
  • a method for scheduling transmissions for a plurality of wireless devices in a multi-user full duplex transmission wireless system comprises determining neighbor wireless devices for a wireless device wirelessly coupled to a base transceiver station (BTS), scheduling transmission from the wireless device to the BTS on a channel when none of the neighbor wireless devices to the wireless device are scheduled to receive data from the BTS on the channel, and scheduling data transmission to the wireless device from the BTS on the channel when none of the neighbor wireless devices are scheduled to transmit to the BTS on the channel.
  • BTS base transceiver station
  • Figure 1 illustrates a network for communicating data
  • Figures 2A-2C illustrate an embodiment system for BTS scheduling of UEs transmission and reception times
  • Figures 3A-3C illustrate an embodiment system for multiple BTS scheduling of UEs transmission and reception times
  • Figures 4 A - 4C illustrate an embodiment system for BTS scheduling of UEs for UE to BTS channel sounding
  • Figures 5A-5C illustrate an embodiment system for multiple BTS scheduling of UE to BTS channel sounding
  • Figure 6 illustrates a flowchart of an embodiment method for scheduling of UEs.
  • Figure 7 is a processing system that can be used to implement various embodiments.
  • Various embodiments provide a scheme to avoid interference from other UEs via scheduling based on UE neighboring list information for full duplex transmission. Various embodiments further provide a scheme to obtain channel information based on UE location, scheduling information, device to device discovery and base transceiver station (BTS) full duplex transmission (FDT) capability with relaxed self-interference suppression requirements.
  • the UE neighboring list may also include the indication of interference level. The BTS can use this additional information to aid the UE scheduling.
  • the UE neighboring list may also be treated as a logical neighboring list, where a neighbor of a UE is defined as the one whose interference to this UE is above a certain level.
  • the BTS can also create this logical neighboring list based on the physical neighboring list and use the logical list for scheduling.
  • Benefits of an embodiment may include the enablement of multi-user access for full duplex transmission, which may increase overall capacity up to about two times.
  • Other benefits of an embodiment may include the enablement of CoMP, cloud radio access network (CRAN), IA and massive MEMO for FDD without additional channel state feedback overhead and for TDD without calibration, thus increasing overall capacity.
  • CRAN cloud radio access network
  • IA massive MEMO for FDD without additional channel state feedback overhead and for TDD without calibration, thus increasing overall capacity.
  • the BTS forms a neighbor list of UEs via device discovery, and/or UE location discovery, and/or GPS, and/or using UE mobility information and prediction, and UE interference measurement.
  • the BTS schedules a UE's data transmission on downlink (DL) frequency at the resources not used by its neighbors to avoid interference on data reception of other UEs.
  • the BTS can divide UEs into multiple groups based on a reference signal received power (RSRP) or path loss measurement, and schedule UEs from different groups to avoid interference.
  • RSRP reference signal received power
  • the BTS forms a neighbor list of UEs via device discovery, and/or UE location discovery, and/or GPS, and/or using mobility information and prediction, and UE interference measurement.
  • the BTS schedules UEs sounding on DL frequency to avoid interference on data reception of other UEs.
  • sounding or channel sounding may be used interchangeably and may include methods for determining channel state information and/or the quality of a wireless channel.
  • the main purpose of sounding is to determine the channel state information. Sounding is a mechanism in which a pilot sequence is sent by a UE and the BTS determines the channel response based on the received pilots.
  • the full channel state information can be obtained by interpolating the channels based on measured channels on pilots. Multiple UE's pilot can be sent simultaneously via frequency, code, and time division.
  • An OFDM is a method of encoding digital data on multiple carrier frequencies (often called multiple sub-carriers). For an OFDM system, multiple subcarriers in frequency and time domain can be assigned to a UE to transmit data, where those subcarriers are referred as resources.
  • the quality of the wireless channel may be determined based on the signal strength, the amount of interference, bandwidth, throughput, or other indicia of channel quality. The quality of the wireless channel may also be determined based on a combination of factors.
  • FIG. 1 illustrates a network 100 for communicating data.
  • the network 100 includes an access point (AP) 110 having a coverage area 112, a plurality of user equipment (UEs) 120, and a backhaul network 130.
  • AP may also be referred to as a transmission point (TP), a BTS, or an enhanced base station (eNB), and the different terms may be used interchangeably throughout this disclosure.
  • the AP 110 may comprise any component capable of providing wireless access by, inter alia, establishing uplink (dashed line) and/or downlink (dotted line) connections with the UEs 120, such as a BTS, an eNB, a femtocell, and other wirelessly enabled devices.
  • the UEs 120 may comprise any component capable of establishing a wireless connection with the AP 110.
  • the backhaul network 130 may be any component or collection of components that allow data to be exchanged between the AP 110 and a remote end (not shown in Figure 1).
  • the network 100 may comprise various other wireless devices, such as relays, femtocells, etc.
  • FIGS 2A-2C illustrate an embodiment system 200 for BTS scheduling of UEs transmission and reception interval over the same channel resources.
  • the system 200 may be similar to the network 100 illustrated in Figure 1.
  • the system 200 may include a BTS 204 and a plurality of UEs 206.
  • the BTS 204 may have a coverage area 202 as illustrated.
  • the BTS 204 may be any device that is capable of establishing uplinks (ULs) and downlinks (DLs) with the UEs 206.
  • the DLs refer to the transmission links from the BTS 204 to the UEs 206 and the ULs refer to the transmission links from the UEs 206 to the BTS 204.
  • the BTS 204 may utilize full duplex allowing the BTS 204 to send and receive data on the same channel at the same time.
  • the channel refers to the frequency carrier.
  • the DL and the UL in a full duplex system may use the same channel.
  • the BTS 204 may include a processing system capable of receiving or determining neighbors of the UEs 206 and determining a schedule for the UEs 206 to transmit and receive based on the identified neighbors.
  • the UEs 206 may also be referred to as wireless devices.
  • the UEs 206 may be any device capable of establishing a wireless connection with the BTS 204. Examples of wireless devices include mobile phones, smart phones, table computers, laptop computers, and the like. One, several, or all of the UEs 206 may be capable of full duplex transmission and reception.
  • a device operating in full duplex mode may transmit and receive on the same channel simultaneously.
  • a device operating in half duplex mode may both transmit and receive on the same channel, but may not do so at the same time (e.g., the device may transmit on the channel and then receive on the same channel at a later time).
  • TDD time division duplex
  • FDD frequency division duplex
  • the UE transmits and receives simultaneously, but on different frequency channels.
  • the dashed lines with an "X" indicate that the UEs 206 connected by the dashed lines are not neighbors of one another.
  • Figure 2B illustrates a UE 206 neighbor list 220 for the UEs 206 identified in Figure 2A.
  • the neighbors of UEl may be UE2.
  • the neighbors of UE2 may be UEl and UE3.
  • the neighbors of UE3 may be UE2 and UE4.
  • the neighbors of UE4 may be UE3.
  • the neighbor list for each UE 206 may be determined by the UE 206 and transmitted to the BTS 204 from the UE 206.
  • the BTS 204 may use the neighbor list for each UE 206 to compile a master neighbor list for all the UEs 206 in the BTS's 204 coverage area 202.
  • Each UE 206 may determine its neighbors by measuring a signal strength of other UEs 206.
  • the signal from each UE 206 may identify, provide an identifier for, or otherwise provide an identification of the UE 206. If the signal strength of a UE 206 exceeds a threshold, then the UE 206 may be considered a neighbor. UEs 206 whose signal strength at a specific UE 206 does not exceed a threshold may not be considered neighbors since their signals may not be sufficiently strong to cause significant interference at the measuring UE 206.
  • the signals received by the UEs 206 from other UEs 206 may include an identifier.
  • the definition of a neighbor or neighboring wireless device may vary depending on implementation and, in an embodiment, may be a wireless device that is capable of or is causing interference with another wireless device.
  • the BTS 204 may determine the location(s) of the UEs 206 (e.g., using a global positioning system (GPS) or other location determining method) and determine a neighbor list for each UE 206 based on their proximity to other UEs 206. In addition to the position information, the BTS 204 may also determine the type of each UE 206 and use this information in determining a neighbor list for each UE 206 since different types of UEs 206 may have different signal strength characteristics. The BTS 204 may also use the neighbor lists of UEs 206 that provide the information to the BTS and may determine the neighbor list for other UEs 206 that may be incapable of determining a neighbor list independently. The combination of the UE 206 determined neighbors and the BTS 204 determined neighbors may be used to create the master list of UE 206 neighbors.
  • GPS global positioning system
  • the neighbor lists may change dynamically with time since UEs 206 may move within the coverage area 202, may move outside the coverage area 202, or may be powered down (e.g., turned off). Additionally, other UEs 206 may be powered on (e.g., turned on) or may enter the coverage area 202. Thus, the UEs 206 that may be considered neighbors of each other at one time may not be neighbors at another time. Since the neighbor lists may change dynamically with time, the schedule determined by the BTS 204 may change with time. The master neighbor list and the schedule may be updated periodically or when the BTS 204 determines that one or more of the UEs 206 neighbors has changed.
  • the BTS 204 may determine a transmission and reception schedule 230 for the UEs 206.
  • the transmission and reception schedule may be determined such that no neighbor to a UE 206 may transmit using the same resources as the UE 206 when the UE 206 is using those resources to receive data, thereby mitigating interference effects experienced by the receiving UE 206 caused by other UEs 206 in the coverage area 202.
  • any non-UEl neighbors can transmit data using the same resources as UEl while UE1 receives data from the BTS 204 (e.g., at the same time on the same sub-carrier as UEl).
  • any non-UE2 neighbors i.e., UE4 may transmit data using the same resources as UE2 (e.g., at the same time on the same sub-carrier as UE2).
  • UE 1 may transmit data to the BTS 204 on the same resources.
  • UE2 and UE4 may not transmit data using the same resources since they are neighbors to UE 3.
  • any UE 206 that is capable of full duplex transmission may receive and transmit data simultaneously since the UE 206 may be aware of its self-interference and may utilize well known methods for cancelling or mitigating the self-interference.
  • system 200 may include any number of UEs 206 and is not limited to four. Additionally, a UE 206 may have more than two neighbors, may only have one neighbor, or may have no neighbors.
  • FIG. 3 A-3C illustrate an embodiment system 300 for multiple BTS scheduling of UEs transmission and reception times.
  • the system 300 may be similar to the system 200 illustrated in Figure 2A except for the inclusion of multiple BTSs instead of a single BTS.
  • the system 300 may include multiple BTS's 306 and a plurality of UEs 308.
  • Each BTS 306 may have its own coverage area 302, 304.
  • BTS1 has a coverage area 302 which may include UEl 1, UE12, and UE14.
  • BTS2 may have a coverage area 304 which may include UE21, UE23, and UE24.
  • Each BTS 306 may be similar to BTS 204 in Figure 2A.
  • the UEs 308 may be similar to the UEs 206 in Figure 2A.
  • the BTS's 306 may determine the neighbors for the plurality of UEs 308 as described above with reference to Figures 2A-2C.
  • UE 14 and UE 21 may be on the edge of their respective coverage areas 302, 304. As such, UEl 4 and UE 21 may be neighbors to one another and may potentially cause interference in one another even though they communicate with different BTSs 306. Therefore, BTSl and BTS2 may coordinate their transmission and reception schedules such that UEl 4 and UE21 are not transmitting data while the other one is receiving data.
  • a master neighbor list may be created that includes UE neighbors for both coverage areas 302, 304.
  • BTSl may determine a transmission and reception schedule for all the UEs 308 in both coverage areas 302 and 304. The schedule may be transmitted to the BTS2 through a backhaul network (not shown) such as backhaul network 130 depicted in Figure 1.
  • Both the BTSl and the BTS2 may use the schedule to prevent neighbor UEs 308 in both the UEs own coverage area 302, 304 and in neighboring coverage areas 302, 304 from transmitting when a neighbor UE 308 is receiving data from the BTS 306.
  • the BTSl and the BTS2 may alternate creating the schedules or periodically or occasionally switch which one creates the schedules.
  • both BTS's 306 may create the schedules using the same algorithm to computer the schedules based on the same neighbor list, thereby ensuring that both BTS's 306 execute the same schedule.
  • a central controller (not shown in Figure 3 A) may take care of the scheduling for both BTSl and BTS2 and forward the schedule to both BTSl and BTS2.
  • Figure 3B illustrates a UE 308 neighbor list 320 for the UEs 308 identified in Figure 3 A.
  • the neighbors for UEl 1 may be UEl 2
  • the neighbors for UEl 2 may be UEl 1 and UEl 4
  • the neighbors for UEl 4 may be UEl 2 and UE21
  • the neighbors for UE21 may be UE 14 and UE 23
  • the neighbors for UE 23 may be UE21 and UE 24, and the neighbors for UE24 may be UE23.
  • a partial UE transmission and reception schedule 330 is shown based on the neighbor list of Figure 3B.
  • the partial UE transmission and reception schedule 330 does not show the schedule for all of the UEs for all times.
  • UEl 1 may receive data from BTSl
  • UE23 may receive data from BTS2
  • UE14 may transmit data to the BTSl at the same time.
  • UE12, UE24, and UE21 may not transmit at the time this time.
  • UE12 may receive data from BTSl
  • UE24 may receive data from BTS2
  • UE 21 may transmit data to BTS2 at the same time, but UEl 1 , UE23, and UEl 4 may not transmit at this time.
  • no UEs 308 are transmitting while their neighbor UEs 308 are receiving data from the BTS 306, thereby eliminating a source of interference for UE2 308 that is receiving data.
  • each BTS 306 may reserve a region for cell edge UE's sounding.
  • both BTSl and BTS2 may receive sounding signal from an edge UE 308 that is near the edge of both coverage area 302 and coverage area 304 (e.g., from UE 14)
  • system 300 is described with reference to two BTS's 306 and to six UEs 308, the number of BTS's may be greater than two and the number of UEs may be different in some embodiments. Additionally, a UE 308 may have more than two neighbors or may have no neighbors.
  • FIGS 4A-4C illustrate another embodiment system 400 for BTS scheduling of UEs.
  • the system 400 may be substantially similar to system 200 depicted in Figure 2A.
  • the system 200 may comprise a BTS 404 and a plurality of UEs 406.
  • the BTS 404 may have a coverage area 402.
  • the BTS 404 may be substantially similar to BTS 204 depicted in Figure 2A and the UEs 406 may be substantially similar to the UEs 206 depicted in Figure 2A.
  • the BTS 406 may receive or determine a master neighbor list for the UEs 406 in its coverage area 402.
  • the BTS 406 may determine the neighbors for the UEs 406 in any number of manners such as those described above with reference to Figures 2A-2C.
  • the BTS 404 may schedule BTS to UE data transmissions on the DL and schedule the non-neighboring UEs 406 to perform channel sounding on the same DL at the same time. Neighboring UEs 406 may not perform channel sounding while one of their neighbor UEs 406 is receiving a BTS to UE data transmission on the DL.
  • the BTS 404 may schedule the BTS to UE data transmission on DL first, and then schedule UE to BTS channel sounding on DL for non-neighboring UEs to avoid interfering BTS to DL data transmission.
  • the BS could schedule UE to BTS channel sounding on DL first, then schedule BTS to UE data transmission on DL.
  • the BTS could reserve dedicated resources so that there is no sounding on those resources or can update a neighbor list based on mobility information and prediction.
  • a high mobility UE's sounding channel may be transmitted in a UL frequency.
  • the dedicated resources could also be used for BTS to UE data transmission on DL.
  • Figure 4B illustrates a UE neighbor list 420 for the UEs identified in Figure 4A.
  • the neighbors of UEl may be UE2, the neighbors of UE2 may be UEl and UE3, the neighbors of UE3 may be UE2 and UE4, and the neighbors of UE4 may be UE3.
  • a partial schedule 430 for channel sounding and BTS to UE data transmission is shown in Figure 4C.
  • Channel sounding for any non-UEl neighbors, e.g., UE3 and UE4 may be performed when BTS to UE data transmission is occurring for UEl .
  • no neighbors of UEl e.g., UE2 may perform channel sounding while UEl is receiving data from the BTS 404.
  • BTS to UE data transmission on the DL may be performed for UEl while UE3 (a non-neighboring UE to UEl) performs UE to BTS channel sounding on the DL.
  • BTS to UE data transmission on the DL may be performed for UE2 while UE4 (a non-neighboring UE to UE2) performs UE to BTS channel sounding on the DL.
  • UEs 406 that are performing channel sounding on the DL may also transmit data on the UL at the same time using carrier aggregation (CA).
  • CA carrier aggregation
  • system 400 may include any number of UEs 406 and is not limited to four. Additionally, a UE 406 may have more than two neighbors, may only have one neighbor, or may have no neighbors.
  • FIGS 5 A-5C illustrate an embodiment system 500 for multiple BTS scheduling of UE to BTS sounding.
  • System 500 may be substantially similar to system 300 depicted in Figure 3.
  • System 500 may comprise multiple BTS's 506 and multiple UEs 510.
  • Each BST 506 may have a corresponding coverage area 502.
  • the BTS 506 may determine neighboring devices in a similar manner to those described above with reference to Figures 2A-2C.
  • the BTS 506 in system 500 may coordinate the scheduling of UE to BTS sounding with other BTS's 506 such that UEs 510 on the edge of a coverage area 502, 504 that are near a UE in a different coverage area 502, 504 will be scheduled such that when they perform sounding on the DL, their sounding transmissions will not interfere with a BTS to UE data transmission in a neighboring UE 502 that may be in a different coverage area 502, 504 corresponding to a different BTS 506.
  • Figure 5B illustrates a UE neighbor list 520 for the UEs identified in Figure 5A.
  • the neighbors of UEl 1 may be UE12
  • the neighbors of UE12 may be UEl 1 and UE14
  • the neighbors of UEl 4 may be UE12 and UE21
  • the neighbors of UE21 may be UE 14
  • the neighbors of UE23 may be UE 21 and UE 24, and the neighbors of UE24 may be UE23.
  • a partial schedule 530 for channel sounding and BTS to UE data transmission is shown in Figure 5C.
  • Channel sounding for any non-UEl 1 neighbors may be performed when BTS to UE data transmission is occurring for UEl 1.
  • no neighbors of UEl 1 e.g., UEl 2 may perform channel sounding while UEl 1 is receiving data from the BTS1 506.
  • BTS to UE data transmission on the DL may be performed for UEl 1 and UE23 while UE14 (a non-neighboring UE to UEl 1 and UE23) performs UE to BTS channel sounding on the DL.
  • BTS to UE data transmission on the DL may be performed for UE12 and UE24 while UE21 (a non-neighboring UE to UE12 and UE24) performs UE to BTS channel sounding on the DL.
  • system 500 is described with reference to two BTS's 506 and to six UEs 510, the number of BTS's may be greater than two and the number of UEs may be different in some embodiments. Additionally, in an embodiment, a UE 510 may have more than two neighbors or may have no neighbors.
  • Embodiments are not limited to UE to BTS channel sounding on DL, for example, embodiments may include UE to BTS data and control signaling transmission on DL frequency carrier, including low data rate spreading, low data rate traffic, highly protected control channels, etc.
  • UE to BTS data and control signaling transmission on DL frequency carrier including low data rate spreading, low data rate traffic, highly protected control channels, etc.
  • CDMA code division multiple access
  • OFDM sub-carriers for example via code division multiple access (CDMA), or spreading over OFDM sub-carriers
  • Embodiments also may be used for full duplex transmission on UL.
  • FIG. 6 illustrates a flowchart of an embodiment method 600 for scheduling of UEs.
  • the method 600 may be implemented, for example, in a BTS such as BTS 110 in Figure 1 , BTS 204 in Figure 2A, BTS's 306 in Figure 3A, BTS 404 in Figure 4A, or BTS's 506 in Figure 5A.
  • the method 600 may begin at 602 where the BTS may identify the neighbors for a plurality of UEs in the BTS coverage area. In an embodiment, some or all of the UEs in the BTS's coverage area may report their neighbors to the BTS. The BTS may also identify the neighbors for UEs that are in other BTS's coverage areas.
  • the BTS may determine a transmission schedule for the plurality of UEs such that a UE is not scheduled to transmit when a neighboring UE is scheduled to receive a BTS to UE transmission data.
  • a UE may perform UE to BTS transmissions during a time when a BTS to UE data transmission is scheduled for a non- neighboring UE.
  • UE to BTS transmissions may include UE to BTS channel sounding, UE to BTS data transmission, and UE to BTS data and control signaling transmission on DL, including low data rate spreading, highly protected control channels, etc.
  • the BTS may transmit the transmission schedules to the UEs, after which, the method 600 may end.
  • FIG. 7 is a block diagram of a processing system 700 that may be used for implementing the devices and methods disclosed herein. Specific devices may utilize all of the components shown, or only a subset of the components, and levels of integration may vary from device to device. Furthermore, a device may contain multiple instances of a component, such as multiple processing units, processors, memories, transmitters, receivers, etc.
  • the processing system 700 may comprise a processing unit 701 equipped with one or more input/output devices, such as a speaker, microphone, mouse, touchscreen, keypad, keyboard, printer, display, and the like.
  • the processing unit 701 may include a central processing unit (CPU) 710, memory 720, a mass storage device 730, a network interface 750, and an I/O interface 760 connected to a bus 740.
  • CPU central processing unit
  • the bus 740 may be one or more of any type of several bus architectures including a memory bus or memory controller, a peripheral bus, video bus, or the like.
  • the CPU 710 may comprise any type of electronic data processor.
  • the memory 720 may comprise any type of system memory such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), read-only memory (ROM), a combination thereof, or the like.
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • ROM read-only memory
  • the memory 720 may include ROM for use at boot-up, and DRAM for program and data storage for use while executing programs.
  • the mass storage device 730 may comprise any type of storage device configured to store data, programs, and other information and to make the data, programs, and other
  • the mass storage device 730 may comprise, for example, one or more of a solid state drive, hard disk drive, a magnetic disk drive, an optical disk drive, or the like.
  • the I/O interface 760 may provide interfaces to couple external input and output devices to the processing unit 701.
  • the I/O interface 760 may include a video adapter.
  • Examples of input and output devices may include a display coupled to the video adapter and a mouse/keyboard/printer coupled to the I/O interface.
  • Other devices may be coupled to the processing unit 701 , and additional or fewer interface cards may be utilized.
  • a serial interface such as Universal Serial Bus (USB) (not shown) may be used to provide an interface for a printer.
  • USB Universal Serial Bus
  • the processing unit 701 may also include one or more network interfaces 750, which may comprise wired links, such as an Ethernet cable or the like, and/or wireless links to access nodes or different networks.
  • the network interface 701 allows the processing unit to communicate with remote units via the networks 780.
  • the network interface 750 may provide wireless communication via one or more transmitters/transmit antennas and one or more receivers/receive antennas.
  • the processing unit 701 is coupled to a local-area network or a wide-area network for data processing and communications with remote devices, such as other processing units, the Internet, remote storage facilities, or the like.

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Abstract

Des modes de réalisation de l'invention concernent un système et un procédé de programmation de la transmission et de la réception de dispositifs sans fil dans un environnement de transmission multiutilisateur en duplex total. Ces modes de réalisation permettent d'éviter une interférence entre des dispositifs sans fil voisins. Le système et le procédé permettent également d'estimer une voie. Dans un mode de réalisation, un procédé de programmation de transmissions dans un système multiutilisateur sans fil comprend : la détermination, par un point de transmission, de dispositifs sans fil voisins pour chacun d'une pluralité de dispositifs sans fil situés dans une zone de couverture du point de transmission ; et la détermination, par le point de transmission, d'un programme de transmission pour les dispositifs sans fil respectifs de la pluralité des dispositifs sans fil sur la base des informations de voisinage des dispositifs, de telle sorte que chaque dispositif sans fil respectif soit programmé pour transmettre des données sur des ressources temps-fréquence différentes de celles dans lesquelles des dispositifs sans fil voisins du dispositif sans fil respectif sont programmés pour recevoir des données.
PCT/CN2013/089529 2012-12-14 2013-12-16 Systèmes et procédés pour éviter une interférence, estimer une voie et exécuter une autre signalisation dans une transmission multiutilisateur en duplex total WO2014090199A1 (fr)

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CN201380063780.8A CN104838712B (zh) 2012-12-14 2013-12-16 用于多用户全双工传输的干扰避免、信道探测和其它信令的系统和方法
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US20140169234A1 (en) 2014-06-19
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